Appeal 2006-2328
Application 10/131,049
The differences between the subject matter of claim 58 and Arai are
that Arai does not disclose: (1) "said microcomputer generating separate
reference horizontal vertical synchronous signals when at least one
synchronous signal is not detected from said computer"; (2) "said
microcomputer providing said separated horizontal and vertical synchronous
signals or said separate reference horizontal and vertical synchronous signals
to said synchronous signal processor"; and (3) a "synchronous signal
processor outputting processed vertical and horizontal synchronous signals to
said video signal processor." For simplicity, we assume that claim 58
requires generating reference horizontal and vertical synchronous signals if no
input horizontal and vertical synchronous signals are received, although the
"one input synchronous signal" language is broad enough to read on not
receiving only one of the vertical or horizontal synchronous signals.
Yamagishi provides a general teaching of supplying a replacement
"reference" synchronizing signal (INT. Sync) when a selected synchronizing
signal (Input Sync or EXT. Sync) is detected as missing for the advantage of
allowing subsequent circuit stages to continue to operate. One of ordinary
skill in the art would have been motivated to apply Yamagishi's solution of
generating a replacement sync signal to any situation where the problem of
missing input sync signals may occur for the described advantage in
Yamagishi of allowing subsequent circuit stages to operate without halting.
Thus, one of ordinary skill in the art would have been motivated to modify the
microcomputer in Arai to provide for generating replacement reference
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